void RealizeVisualBrush(VisualBrush brush, ref XForm xform)
{
//Debug.Assert(xform != null);
xform = new XForm(this.writer.Owner, new XRect(brush.Viewbox.X * 3 / 4, brush.Viewbox.Y * 3 / 4, brush.Viewbox.Width * 3 / 4, brush.Viewbox.Height * 3 / 4));
Visual visual = brush.Visual;
PdfContentWriter formWriter = new PdfContentWriter(this.writer.Context, xform, RenderMode.Default);
//formWriter.Size = brush.Viewport.Size;
formWriter.BeginContent(false);
formWriter.WriteElement(visual);
formWriter.EndContent();
}
/// <summary>
/// Creates an XForm from a visual brush.
/// </summary>
public static XForm FromVisualBrush(DocumentRenderingContext context, VisualBrush brush)
{
//XPImage xpImage = ImageBuilder.FromImageBrush(context, brush);
//XImage ximage = xpImage.XImage;
double width = brush.Viewport.Width;
double height = brush.Viewport.Height;
// view box in point
// XRect box = new XRect(brush.Viewbox.X * 0.75, brush.Viewbox.Y * 0.75, brush.Viewbox.Width * 0.75, brush.Viewbox.Height * 0.75);
XRect box = new XRect(0, 0, width, height);
XForm xform = new XForm(context.PdfDocument, box);
PdfContentWriter formWriter = new PdfContentWriter(context, xform, RenderMode.Default);
PdfFormXObject pdfForm = xform.PdfForm;
pdfForm.Elements.SetMatrix(PdfFormXObject.Keys.Matrix, new XMatrix());
//formWriter.Size = brush.Viewport.Size;
formWriter.BeginContent(false);
formWriter.WriteElement(brush.Visual);
formWriter.EndContent();
return xform;
}
/// <summary>
/// Parses a VisualBrush element.
/// </summary>
VisualBrush ParseVisualBrush()
{
bool isEmptyElement = this.reader.IsEmptyElement;
VisualBrush brush = new VisualBrush();
while (MoveToNextAttribute())
{
switch (this.reader.Name)
{
case "Opacity":
brush.Opacity = ParseDouble(this.reader.Value);
break;
case "Transform":
brush.Transform = ParseMatrixTransform(this.reader.Value);
break;
case "Viewbox":
brush.Viewbox = Rect.Parse(this.reader.Value);
break;
case "Viewport":
brush.Viewport = Rect.Parse(this.reader.Value);
break;
case "TileMode":
brush.TileMode = ParseEnum<TileMode>(this.reader.Value);
break;
case "ViewboxUnits":
brush.ViewboxUnits = ParseEnum<ViewUnits>(this.reader.Value);
break;
case "ViewportUnits":
brush.ViewportUnits = ParseEnum<ViewUnits>(this.reader.Value);
break;
case "Visual":
brush.Visual = ParseVisual();
break;
case "x:Key":
brush.Key = this.reader.Value;
break;
}
}
if (!isEmptyElement)
{
MoveToNextElement();
while (this.reader.IsStartElement())
{
switch (this.reader.Name)
{
case "VisualBrush.Transform":
MoveToNextElement();
brush.Transform = ParseMatrixTransform();
break;
case "VisualBrush.GradientStops":
MoveToNextElement();
//brush.GradientStops= ParseGradientStops();
break;
case "VisualBrush.Visual":
//MoveToNextElement();
brush.Visual = ParseVisual();
brush.Visual.Parent = brush;
break;
default:
Debugger.Break();
break;
}
}
}
MoveToNextElement();
return brush;
}
/// <summary>
/// Builds a PdfTilingPattern pattern from a visual brush.
/// </summary>
public static PdfTilingPattern BuildFromVisualBrush(DocumentRenderingContext context, VisualBrush brush, XMatrix transform)
{
TilingPatternBuilder builder = new TilingPatternBuilder(context);
PdfTilingPattern pdfPattern = builder.BuildPattern(brush, transform);
return pdfPattern;
}
PdfTilingPattern BuildPattern(VisualBrush brush, XMatrix transform)
{
// Bounding box lays always at (0,0)
XRect bbox = new XRect(0, 0, brush.Viewport.Width, brush.Viewport.Height);
XMatrix matrix = transform;
matrix.Prepend(new XMatrix(1, 0, 0, 1, brush.Viewport.X, brush.Viewport.Y));
if (brush.Transform != null)
{
matrix.Prepend(new XMatrix(brush.Transform.Matrix.m11, brush.Transform.Matrix.m12, brush.Transform.Matrix.m21,
brush.Transform.Matrix.m22, brush.Transform.Matrix.offsetX, brush.Transform.Matrix.offsetY));
}
// Set X Step beyond the viewport if tilemode is set to none since
// there is no other easy way to turn off tiling - NPJ
double xStep = brush.Viewport.Width * (brush.TileMode == TileMode.None ? 2 : 1);
double yStep = brush.Viewport.Height * (brush.TileMode == TileMode.None ? 2 : 1);
// PdfTilingPattern
//<<
// /BBox [0 0 240 120]
// /Length 74
// /Matrix [0.75 0 0 -0.75 0 480]
// /PaintType 1
// /PatternType 1
// /Resources
// <<
// /ExtGState
// <<
// /GS0 10 0 R
// >>
// /XObject
// <<
// /Fm0 17 0 R
// >>
// >>
// /TilingType 3
// /Type /Pattern
// /XStep 480
// /YStep 640
//>>
//stream
// q
// 0 0 240 120 re
// W n
// q
// 2.3999939 0 0 1.1999969 0 0 cm
// /GS0 gs
// /Fm0 Do
// Q
//Q
//endstream
PdfTilingPattern pattern = new PdfTilingPattern(Context.PdfDocument);
Context.PdfDocument.Internals.AddObject(pattern);
pattern.Elements.SetInteger(PdfTilingPattern.Keys.PatternType, 1); // Tiling
pattern.Elements.SetInteger(PdfTilingPattern.Keys.PaintType, 1); // Color
pattern.Elements.SetInteger(PdfTilingPattern.Keys.TilingType, 3); // Constant spacing and faster tiling
pattern.Elements.SetMatrix(PdfTilingPattern.Keys.Matrix, matrix);
pattern.Elements.SetRectangle(PdfTilingPattern.Keys.BBox, new PdfRectangle(bbox));
pattern.Elements.SetReal(PdfTilingPattern.Keys.XStep, xStep);
pattern.Elements.SetReal(PdfTilingPattern.Keys.YStep, yStep);
// Set extended graphic state like Acrobat do
PdfExtGState pdfExtGState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>();
pdfExtGState.SetDefault1();
PdfFormXObject pdfForm = BuildForm(brush);
PdfContentWriter writer = new PdfContentWriter(Context, pattern);
writer.BeginContentRaw();
// Acrobat 8 clips to bounding box, so do we
//writer.WriteClip(bbox);
XMatrix transformation = new XMatrix();
double dx = brush.Viewport.Width / brush.Viewbox.Width * 96 / pdfForm.DpiX;
double dy = brush.Viewport.Height / brush.Viewbox.Height * 96 / pdfForm.DpiY;
transformation = new XMatrix(dx, 0, 0, dy, 0, 0);
writer.WriteMatrix(transformation);
writer.WriteGraphicsState(pdfExtGState);
string name = writer.Resources.AddForm(pdfForm);
writer.WriteLiteral(name + " Do\n");
writer.EndContent();
return pattern;
}
/// <summary>
/// Builds a PdfFormXObject from the specified brush.
/// </summary>
PdfFormXObject BuildForm(VisualBrush brush)
{
//<<
// /BBox [0 100 100 0]
// /Length 65
// /Matrix [1 0 0 1 0 0]
// /Resources
// <<
// /ColorSpace
// <<
// /CS0 15 0 R
// >>
// /ExtGState
// <<
// /GS0 10 0 R
// >>
// /ProcSet [/PDF /ImageC /ImageI]
// /XObject
// <<
// /Im0 16 0 R
// >>
// >>
// /Subtype /Form
//>>
//stream
// q
// 0 0 100 100 re
// W n
// q
// /GS0 gs
// 100 0 0 -100 0 100 cm
// /Im0 Do
// Q
//Q
//endstream
PdfFormXObject pdfForm = Context.PdfDocument.Internals.CreateIndirectObject<PdfFormXObject>();
pdfForm.DpiX = 96;
pdfForm.DpiY = 96;
// view box
var box = new PdfRectangle(brush.Viewbox.X, brush.Viewbox.Y + brush.Viewbox.Height - 1, brush.Viewbox.X + brush.Viewbox.Width - 1, brush.Viewbox.Y);
pdfForm.Elements.SetRectangle(PdfFormXObject.Keys.BBox, box);
pdfForm.Elements.SetMatrix(PdfFormXObject.Keys.Matrix, new XMatrix());
PdfContentWriter writer = new PdfContentWriter(Context, pdfForm);
pdfForm.Elements.SetMatrix(PdfFormXObject.Keys.Matrix, new XMatrix());
writer.BeginContentRaw();
writer.WriteLiteral("-100 Tz\n");
writer.WriteLiteral("q\n");
writer.WriteVisual(brush.Visual);
writer.WriteLiteral("Q\n");
#if DEBUG
if (DevHelper.BorderPatterns)
writer.WriteLiteral("1 1 1 rg 0 0 m {0:0.###} 0 l {0:0.###} {1:0.###} l 0 {1:0.###} l h s\n",
brush.Viewbox.Width, brush.Viewbox.Height);
#endif
writer.EndContent();
return pdfForm;
}
